This May 08 2021 AGS in my daily mule will complete 3 years. I purchased it dry prepared it using pyro electrolyte solution. Slow Charged it for 8 hours before installing it in the car. Only maintenance i did was electrolyte check and clean terminals.
By All means i will push it further, plan to change it any day if it fail to crank engine for cold start.
3 years trouble free service is enough.